Screen section to clear

Is it possible to only clear one part of the screen?? For example I am making a game and when you get into a fight underneath the all the data about monster etc etc there is a menu made with character mapping. I want this menu to update if the user deals damage dealt damage you know the ussual so that in to message part of the menu it says something like "You took 5 damage"and then it goes away in 3 sec or so

1. I tried to download all of the libraries but none of them seem to work I am using win zip is this maybe the reason? If it is what compresser should I be using to read these files?

2. I'll probally be using this method after i have read through it but for now i have another problem. In the message section of the Menu its going to display Last enemy fought, money gained and skill gained but these vary in size so the menu messes up when the name of the enemy is to long. Is there anyway to make that side of the menu wall static?? Or something like that?